src/lib/ostream.c

	ostream.c revision 6cc0546c058f3e6253c6f99727b28dd602712974
/* Copyright (c) 2002-2007 Dovecot authors, see the included COPYING file */

#include "lib.h"
#include "istream.h"
#include "ostream-internal.h"

void o_stream_destroy(struct ostream **stream)
{
    o_stream_close(*stream);
    o_stream_unref(stream);
}

void o_stream_ref(struct ostream *stream)
{
    io_stream_ref(&stream->real_stream->iostream);
}

void o_stream_unref(struct ostream **stream)
{
    io_stream_unref(&(*stream)->real_stream->iostream);
    *stream = NULL;
}

void o_stream_close(struct ostream *stream)
{
    io_stream_close(&stream->real_stream->iostream);
    stream->closed = TRUE;
}

#undef o_stream_set_flush_callback
void o_stream_set_flush_callback(struct ostream *stream,
                 stream_flush_callback_t *callback,
                 void *context)
{
    struct ostream_private *_stream = stream->real_stream;

    _stream->callback = callback;
    _stream->context = context;
}

void o_stream_unset_flush_callback(struct ostream *stream)
{
    struct ostream_private *_stream = stream->real_stream;

    _stream->callback = NULL;
    _stream->context = NULL;
}

void o_stream_set_max_buffer_size(struct ostream *stream, size_t max_size)
{
    io_stream_set_max_buffer_size(&stream->real_stream->iostream, max_size);
}

void o_stream_cork(struct ostream *stream)
{
    struct ostream_private *_stream = stream->real_stream;

    if (unlikely(stream->closed))
        return;

    _stream->cork(_stream, TRUE);
}

void o_stream_uncork(struct ostream *stream)
{
    struct ostream_private *_stream = stream->real_stream;

    if (unlikely(stream->closed))
        return;

    _stream->cork(_stream, FALSE);
}

int o_stream_flush(struct ostream *stream)
{
    struct ostream_private *_stream = stream->real_stream;
    int ret;

    if (unlikely(stream->closed))
        return -1;

    stream->stream_errno = 0;
    if (unlikely((ret = _stream->flush(_stream)) < 0)) {
        i_assert(stream->stream_errno != 0);
        stream->last_failed_errno = stream->stream_errno;
    }
    return ret;
}

void o_stream_set_flush_pending(struct ostream *stream, bool set)
{
    struct ostream_private *_stream = stream->real_stream;

    if (unlikely(stream->closed))
        return;

    _stream->flush_pending(_stream, set);
}

size_t o_stream_get_buffer_used_size(struct ostream *stream)
{
    struct ostream_private *_stream = stream->real_stream;

    return _stream->get_used_size(_stream);
}

int o_stream_seek(struct ostream *stream, uoff_t offset)
{
    struct ostream_private *_stream = stream->real_stream;

    if (unlikely(stream->closed))
        return -1;

    stream->stream_errno = 0;
    if (unlikely(_stream->seek(_stream, offset) < 0)) {
        i_assert(stream->stream_errno != 0);
        stream->last_failed_errno = stream->stream_errno;
    }
    return 1;
}

ssize_t o_stream_send(struct ostream *stream, const void *data, size_t size)
{
    struct const_iovec iov;

    iov.iov_base = data;
    iov.iov_len = size;

    return o_stream_sendv(stream, &iov, 1);
}

ssize_t o_stream_sendv(struct ostream *stream, const struct const_iovec *iov,
               unsigned int iov_count)
{
    struct ostream_private *_stream = stream->real_stream;
    unsigned int i;
    size_t total_size;
    ssize_t ret;

    if (unlikely(stream->closed))
        return -1;

    stream->stream_errno = 0;
    for (i = 0, total_size = 0; i < iov_count; i++)
        total_size += iov[i].iov_len;

    ret = _stream->sendv(_stream, iov, iov_count);
    if (unlikely(ret != (ssize_t)total_size)) {
        if (ret < 0) {
            i_assert(stream->stream_errno != 0);
            stream->last_failed_errno = stream->stream_errno;
        } else {
            stream->overflow = TRUE;
        }
    }
    return ret;
}

ssize_t o_stream_send_str(struct ostream *stream, const char *str)
{
    return o_stream_send(stream, str, strlen(str));
}

off_t o_stream_send_istream(struct ostream *outstream,
                struct istream *instream)
{
    struct ostream_private *_outstream = outstream->real_stream;
    off_t ret;

    if (unlikely(outstream->closed || instream->closed))
        return -1;

    outstream->stream_errno = 0;
    ret = _outstream->send_istream(_outstream, instream);
    if (unlikely(ret < 0))
        errno = outstream->stream_errno;
    return ret;
}

struct ostream *o_stream_create(struct ostream_private *_stream)
{
    _stream->ostream.real_stream = _stream;

    io_stream_init(&_stream->iostream);
    return &_stream->ostream;
}